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In diamond lattice, all attice point and...

In diamond lattice, all attice point and alternate tetrahedral voids are occupied by carbon atoms.
if diamond crystallizes in fcc form with edge length 'a' find out .
(b) distance between the next nearest neighbours.

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(a) Nerest neighbours are atoms at the lattice points and tetrahedral vodis. Hence, next nearest neighbours are atoms at the attice points.
Number of next nearest neighbours = 12 ( being fcc lattice)
(b) For fcc, nearest neighbour distance (d) =` a/sqrt2 = 0.707 ` a
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